I have to admit, the wikipedia page entry is a mess on this, and I haven't looked at any other sources.  1M just seems very, very high.
Iraq was a mistake, because we ended up taking out a secular authority in the Middle East.  Obama continued this, taking out Qadaffi after he came to our side (totally insane), and opposing secular authorities in Egypt and Syria.  The great thing about secular authorities is that they don't want to die, and can therefore be negotiated with.
Regarding eliminating war as conflict resolutuion:  People have been wanting to that for hundreds, maybe thousands of years.  I don't see another option being put on the table any time soon.  Pacifists and their families tend to get killed in the world in which we live.  And, it is hard to target only combatants when those combatants use hospitals and mosques and apartment complexes for their command and control facilities.
            
